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Improving ionic conductivity of polymer-based solid electrolytes for lithium metal batteries

Chinese Journal of Chemical Engineering 2022年第3期35卷 202-215页

作者： Q.Yang A.Wang J.Luo W.Tang Key Laboratory for Green Chemical Technology of Ministry of Education State Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Because of its superior safety and excellent processability,solid polymer electrolytes(SPEs)have attracted widespread *** lithium based batteries,SPEs have great prospects in replacing leaky and flammable liquid ***,the low ionic conductivity of SPEs cannot meet the requirements of high energy density systems,which is also an important obstacle to its practical *** this respect,escalating charge carriers(***^(+))and Li^(+)transport paths are two major aspects of improving the ionic conductivity of *** article reviews recent advances from the two perspectives,and the underlying mechanism of these proposed strategies is discussed,including increasing the Li^(+)number and optimizing the Li^(+)transport paths through increasing the types and shortening the distance of Li^(+)transport *** is hoped that this article can enlighten profound thinking and open up new ways to improve the ionic conductivity of SPEs.

关键词： Solid polymer electrolyte Ion conductivity Charge carriers Transport paths Lithium battery

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Effect of rolling schedules on ridging resistance of ultra-thin ferritic stainless steel foil

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Journal of Iron and Steel Research International 2025年第1期32卷 198-214页

作者： Jing-wei Zhao Qing-zhong Xie Li-nan Ma Cun-long Zhou Zheng-yi Jiang Xi Liao Xiao-guang Ma College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan030024ShanxiChina Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment Ministry of EducationTaiyuan030024ShanxiChina National Key Laboratory of Metal Forming Technology and Heavy Equipment Ministry of Science and TechnologyTaiyuan030024ShanxiChina School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan 030024ShanxiChina School of Mechanical MaterialsBiomedical and Mechatronic EngineeringUniversity of WollongongWollongongNSW2522Australia Shanxi Taigang Stainless Steel Precision Strip Co. Ltd.Taiyuan 030006ShanxiChina

The effect of rolling schedules on the ridging resistance of ultra-thin ferritic stainless steel(FSS)430 foil was evaluated by studying the microstructure and *** results show that specimens processed with three-pass cold rolling under the reductions of 40%,40%and 31%,respectively,exhibit improved ridging resistance owing to the microstructural refinement and the texture structure optimization.A nearly 40%reduction of ridging height can be achieved using the proposed rolling schedule compared to the other two rolling *** addition,the effect of annealing temperature after cold rolling on the ridging resistance of FSS 430 foil is also found to be crucial,and an optimal annealing temperature of 900℃ is obtained for FSS 430 foil with high ridging ***,the improvement in the ridging resistance of FSS 430 foil can be attributed to the reduction in the fraction of{001}<110>and{114}<110>components by optimization of the rolling and annealing processes.

关键词： Ferritic stainless steel foil Ridging Cold rolling Annealing Microstructure Texture

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Theoretical Model of Dynamic Bulk Modulus for Aerated Hydraulic Fluid

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Chinese Journal of Mechanical Engineering 2022年第5期35卷 183-193页

作者： Xiaoming Yuan Weiqi Wang Xuan Zhu Lijie Zhang Hebei Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan UniversityQinhuangdao 066004China Key Laboratory of Advanced Forging&Stamping Technology and Science Ministry of Education of ChinaYanshan UniversityQinhuangdao 066000China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China

Existing models of bulk modulus for aerated hydraulic fluids primarily focus on the effects of pressure and air fraction,whereas the effect of temperature on bulk modulus is *** on the lumped parameter method and the full cavitation model,combined with the improved Henry’s law and the air polytropic course equation,a theoretical model of dynamic bulk modulus for an aerated hydraulic fluid is *** effects of system pressure,air fraction,and temperature on bulk modulus are investigated using the controlled variable *** results show that the dynamic bulk modulus of the aerated hydraulic fluid is inconsistent during the compression *** the same pressure point,the dynamic bulk modulus during expansion is higher than that during *** the same initial air faction and pressure changing period,a higher temperature results in a lower dynamic bulk *** the pressure is lower,the dynamic bulk modulus of each temperature point is more similar to each *** comparing the theoretical results with the actual dynamic bulk modulus of the Shell Tellus S ISO32 standard air-containing oil,the goodness-of-fit between the theoretical model and experimental value at three temperatures is 0.9726,0.9732,and 0.9675,which validates the theoretical *** this study,a calculation model of dynamic bulk modulus that considers temperature factors is *** predicts the dynamic bulk modulus of aerated hydraulic fluids at different temperatures and provides a theoretical basis for improving the analytical model of bulk modulus.

关键词： Aerated hydraulic fluid Dynamic bulk modulus Theory model Air fraction Pressure

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Interfacial bonding characteristics and mechanical properties of H68/AZ31B clad plate

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International Journal of Minerals,Metallurgy and Materials 2022年第6期29卷 1237-1248页

作者： Tingting Zhang Wenxian Wang Jie Zhang Zhifeng Yan Advanced Forming and Intelligent Equipment Research Institute Taiyuan University of TechnologyTaiyuan 030024China College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan 030024China Shanxi Key Laboratory of Advanced Magnesium-based Materials Taiyuan 030024China

Interfacial bonding,microstructures,and mechanical properties of an explosively-welded H68/AZ31B clad plate were systematically *** to the results,the bonding interface demonstrated a“wavy-like”structure containing three typical zones/layers:(1)diffusion layer adjacent to the H68 brass plate;(2)solidification layer of melted metals at the interface;(3)a layer at the side of AZ31B alloy that experienced severe *** copper,CuZn_(2),andα-Mg phases were observed in the melted-solidification *** polygonal grains with twins were found at the H68 alloy side,while fine equiaxed grains were found at the AZ31B alloy side near the interface due to *** results revealed the formation of brittle intermetallic CuZn_(2) phases at the bonding *** interface was bonded well through metallurgical reactions due to diffusion of Cu,Zn,and Mg atoms across the interface and metallurgic reaction of partially melted H68 and AZ31B alloys.

关键词： explosive welding interfacial bonding numerical simulation nanoindentation dissimilar metal composite

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The Vibration Characteristics Analysis on Operating Arm of Rectangular Coordinate Robot 2

The Vibration Characteristics Analysis on Operating Arm of R...

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2nd International Conference on Mechanical Engineering, Intelligent Manufacturing and Automation technology, MEMAT 2022

作者： Han, Wei Wang, Shaozong Zhang, Qian Li, Zhou He, Qin State Key Laboratory of Advanced Forming Technology and Equipment China Academy of Machinery Science and Technology Beijing China

ISBN: (纸本)9783800757619

The operating arm of rectangular coordinate robot is the key component to perform tasks. Its vibration characteristics have an important impact on the operation accuracy and work efficiency of the robot, so it is worth studying and analysing. Based on the deformation displacement relationship of robot operating arm under different time states, this paper proposed the kinematic description method of radial motion of operating arm, and established the dynamic control model of radial motion operating arm by using Hamilton variational principle and modal superposition method. This model focused on the relationship between the driving acceleration, load mass and the vibration characteristics of the operating arm. Through the analytical calculation and finite element analysis of the dynamic model, the influence of these two factors on the vibration amplitude, modal frequency and other modal characteristics of the robot operating arm were explored respectively. The results provided a theoretical basis for the vibration control of the robot operating arm. © VDE VERLAG GMBH ∙ Berlin ∙ Offenbach.

关键词： Robots

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Effect of Ag coatings prepared by magnetron sputtering on the wear properties of Ti6Al4V alloy 11

Effect of Ag coatings prepared by magnetron sputtering on th...

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2024 11th International Conference on advanced Manufacturing technology and Materials Engineering, AMTME 2024

作者： Huang, Xinyu Rong, Wenjuan Wang, Jialin Beijing National Innovation Institute Lightweight. Ltd. Beijing10140 China State Key Laboratory of Advanced Forming Technology and Equipment China Academy of Machinery Science and Technology Beijing101400 China

Ag coatings were prepared on the surface of Ti6Al4V alloy by magnetron sputtering technique, and the effects of different Ag target power and sputtering time on the coating properties were investigated. The coating thickness was firstly measured by a step meter, and then the coatings obtained under different parameters were characterized by Vickers hardness tester, scratch tester, and friction wear tester. The variation in the furnace temperature had a significant effect on the hardness of the coatings: the coating thickness increased slightly with increasing temperature, but the increase was not dramatical. The Vickers hardness of the coatings showed a tendency to increase and then decrease with increasing temperature, reaching a peak at 150 ℃. The hardness of the coatings was found to increase with increasing temperature and then decrease with increasing temperature. Scratch tests further showed that the coatings prepared in the range of 150 ℃ to 180 ℃ exhibited superior bond strength with the substrate. The wear morphology of the coatings showed that the coatings prepared at 150 ℃ had the best wear resistance. At this temperature, the flaking of the coating due to adhesive wear was significantly reduced, and the depth of scratches due to abrasive wear was also reduced. The variation of the Ag target power also had a significant effect on the hardness of the coatings. As the target power increases, the coating thickness increases significantly, and the Vickers hardness increases and then decreases, reaching a maximum at 12 W. The coatings prepared at 10 W show better performance in terms of scratch and wear patterns. These experimental results provide strong data support for the subsequent preparation of Ti6Al4V joint prostheses. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Bond strength (materials)

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Hierarchical microstructure enables high strength and good ductility in as-cast Fe_(27)Ni_(35)Cr_(18.25)Al_(13.75)Co_(2)Ti_(2)Mo_(2) high-entropy alloy

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Journal of Materials Science & technology 2024年第12期179卷 9-21页

作者： Jiacheng Niu Zhiqiang Fu Weiping Chen Tiwen Lu Liangyan Hao Wei Xiong Haiming Wen Guangdong Key Laboratory for Advanced Metallic Materials Processing South China University of TechnologyGuangzhou 510640China National Engineering Research Center of Near-net-shape Forming for Metallic Materials South China University of TechnologyGuangzhou 510640China Key Laboratory of Pressure Systems and Safety Ministry of EducationEast China University of Science and TechnologyShanghai 200237China Physical Metallurgy and Materials Design Laboratory Department of Mechanical Engineering and Materials ScienceUniversity of PittsburghPittsburghPA15261United States of America Department of Materials Science and Engineering Missouri University of Science and TechnologyRollaMissouri 65409United States of America

As-cast alloys often require complex thermomechanical processing to obtain a hierarchical structure to achieve a good combination of strength and *** in this work,a novel hierarchical Fe_(27)Ni_(35)Cr_(18.25)Al_(13.75)Co_(2)Ti_(2)Mo_(2) high-entropy alloy(HEA)with ultra-high tensile strength and excellent ductility was fabricated by direct *** as-cast alloy exhibits hierarchical structure with an ul-trafine lamellar microstructure(ULM),ultrafine rhombus microstructure(URM),ultrafine vermicular mi-crostructure(UVM),nanosized precipitates and spinodal decomposition(SP)that develops during casting and *** incompatibility of face-centered cubic(FCC)and body-centered cubic(BCC)phases in the deformation process leads to heterogeneous deformation-induced(HDI)hardening,which brings the alloy a tensile yield strength(YS)of~1056 MPa,an ultimate tensile strength(UTS)of~1526 MPa and a total elongation(El)of~15.6%.Additionally,the numerous interfaces generated by the hierarchical structure absorb the energy during deformation,effectively retarding the dislocation motion and causing strong work-hardening.

关键词： Direct casting High-entropy alloy Hierarchical microstructure Mechanical properties

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Effect of axial preloading on mechanical behavior during the free-end torsion of an extruded AZ31 magnesium alloy

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International Journal of Minerals,Metallurgy and Materials 2022年第7期29卷 1351-1360页

作者： Qun Li Dan Meng Zhichang Fu Hui Zhao Chong Yang Yan Peng Baodong Shi Key Laboratory of Advanced Forging&Stamping Technology and Science of Ministry of Education School of Mechanical EngineeringYanshan UniversityQinhuangdao 066004China National Engineering Research Center for Equipment and Technology of Cold Rolled Strip School of Mechanical EngineeringYanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

Large plastic deformation commonly occurs during the practical forming process in *** with uniaxial tension/compression,torsion is a more effective approach to investigate mechanical behavior under large *** response of the large strain torsion of magnesium alloy is sensitive to the initial texture and ***,an extruded AZ31 alloy was pre-stressed in tension and compression to introduce dislocations and twins in the current ***,torsion tests were conducted to clarify the effects of twinning and dislocation on subsequent deformation *** corresponding microstructure and deformation mechanisms were explored on the basis of viscoplastic self-consistent(VPSC)*** experimental observations on stress-strain responses and pole figures were captured by simulation *** was found that twins make less contribution to plastic deformation,which results in small change in texture direction under pure torsion and torsion after *** activity of the slip/twin system and the mechanical properties are affected by different initial textures and active conditions of the ***,the stress state during combined tension-torsion loading benefits the reduction of texture intensity.

关键词： magnesium alloy torsion twinning dislocation texture viscoplastic self-consistent

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Optimized design of sliding bearing parameters for electromagnetic direct drive cone crusher 3

Optimized design of sliding bearing parameters for electroma...

引用

3rd International Conference on advanced Materials and Intelligent Manufacturing, ICAMIM 2022

作者： Tian, Fanghong Tang, Chao Li, Liejun Wu, Dongbo Zhang, Qixiao He, Yihua Xu, Erling Shaoguan Casting and Forging Machinery Equipment Co. Ltd 512031 China Guangdong Key Laboratory for Processing and Forming of Advanced Metallic Materials South China University of Technology Guangzhou510640 China

The introduction of direct electromagnetic drive technology into hydraulic cone crusher has brought great progress to the traditional crushing technology, but the sliding bearing has repeatedly burned and held during the trial production of the prototype, which poses a new challenge to the trial work. In this paper, the failure of the sliding bearing of the direct-drive electromagnetic cone machine during the trial operation was analyzed. Then the sliding bearing structure was optimized, which ensured the safe and stable operation of the direct-drive electromagnetic cone machine. © Published under licence by IOP Publishing Ltd.

关键词： Crushers

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Achieving superior strength-ductility synergy in a heterostructured magnesium alloy via low-temperature extrusion and low-temperature annealing

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Journal of Materials Science & technology 2023年第32期163卷 32-44页

作者： H.Wang D.T.Zhang C.Qiu W.W.Zhang D.L.Chen Guangdong Key Laboratory for Advanced Metallic Materials Processing and Forming National Engineering Research Center of Near-net-shape Forming for Metallic MaterialsSouth China University of TechnologyGuangzhou 510640China Department of Mechanical and Industrial Engineering Toronto Metropolitan University(formerly Ryerson University)350 Victoria StreetTorontoON M5B 2K3Canada

A low-alloyed Mg-1.2Zn-0.1Ca(wt.%)alloy was fabricated via low-temperature extrusion and annealing at 250℃for different times(10,30,and 90 min)to attain heterostructures with different fine-grained fractions,focusing on the effect of heterostructure on the mechanical *** dynamic recrystallization(RX)occurred during extrusion at 150℃,and a lamellar structure consisting of fine RX grains and coarse unRX grains was *** subsequent annealing promoted static RX in the as-extruded alloy,leading to an increased fine-grained fraction from 67%to 95%.Meanwhile,the co-segregation of Zn and Ca atoms impeded the migration of grain boundaries,thus achieving a fine grain size of 0.8–1.6μ*** sample annealed for 10 min with a fine-grained fraction of 73%and an average RX grain size of 0.9μm exhibited a superior combination of high yield strength(305 MPa)and good ductility(20%).In comparison,an excellent elongation of 30%was achieved in the alloy with a nearly fully-RXed microstructure and an average grain size of 1.6μm after 90 min annealing,despite a lower yield strength of 228 *** unRX grains,the hard orientation with(01–10)parallel to the extrusion direction and high-density dislocations made it more difficult to deform compared with the RX grains,thus producing hetero-deformation induced(HDI)*** fine grains and high-density dislocations,HDI strengthening is the key to achieving the superior mechanical properties of the low-alloyed Mg alloy.

关键词： Low-alloyed magnesium alloy Low-temperature extrusion Annealing Heterostructure Mechanical properties

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